Common Whitethroat (Sylvia communis).
High perched and singing at full throat he eventually regrouped to eye level position, checking me out for a few seconds before returning to his business.
Olympus OMD E-M5 frame, ISO 400, 1/1000s (~75% crop)
TS102 APO refractor scope 700mm F/6.8 on RH-2 gimbal head
Thanks for looking,
Tord